Glutamine has recently been the focus of much scientific interest. A growing body of evidence suggests that during certain stressful times, the body may require more Glutamine than it can produce. Under these circumstances Glutamine may be considered a "conditionally essential" amino acid. Glutamine is involved in maintaining a positive nitrogen balance (an anabolic state) and aids rapidly growing cells (immune system lymphocytes and intestinal cell enterocytes). In addition, Glutamine is a regulator of acid-base balance and a nitrogen transporter. This double-strength 1000mg dosage is ideal for those that are in heavier training cycles, or individuals under higher degrees of stress. Our NOW natural and organic Supplements are an effective way to ensure you and your loved ones are getting essential vitamins, minerals and nutrients for daily optimal health. Since 1968, NOW has been making top quality products that are tested to the highest standards to empower people to lead healthier lives. Our promise - what is on the label, is precisely what is in the bottle.FAMILY OWNED OPERATED: Our product is proudly packaged by a family owned and operated company since 1968. GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory testing methods (for stability, potency, and product formulation). DOUBLE STRENGTH PRODUCT: 2x the L-Glutamine (1,000 mg per capsule) as in our regular strength product (500 mg per capsule). NITROGEN TRANSPORTER : In the body, glutamine functions as a major nitrogen transporter and is critical for the maintenance of healthy nitrogen balance . NOW Sports products are comprehensively tested so you can trust that our products are pure and effective for every level of athletics.